Tramigo on Traccar is a binary TCP dialect. TramigoFrameDecoder feeds TramigoProtocolDecoder, which understands coordinate/direction helpers, gpsAntennaStatus, maxAcceleration, maxDeceleration, GPRS acknowledgement text such as gprs,ack,, and some ignition narrative strings. Stock port: 5073.
SMS-only units are a different story
Consumer manuals that only show SMS location keywords without GPRS server fields are not automatically this decoder. This page owns the binary 5073 path.
Antenna before server blame
When positions jitter and gpsAntennaStatus is unhealthy, fix the antenna. Rewriting the host will not heal a disconnected patch antenna.
Stance
positions_only with Traccar evidence.